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Rare Metals 2024年第4期43卷 1786-1792页

作者： Yuan-Feng Xie Xing-Cheng Xie zhong-wu li Rui-Jun Cao zhong-Kun lin Qing li Chen-Guang lin Powder Metallurgy and Special Materials Research Department General Research Institute for Nonferrous MetalsBeijing100088China

The effects of cryogenic treatment(CT)and tempering-cryogenic treatment(TCT)on the microstructure and properties of coarse-grained WC-10Co cemented carbides with different carbon contents were *** binder phase,WC mean grain sizes,W solubility in the binder,relative magnetic s aturation,densities,hardness,wear resistance and second phase precipitation of cemented carbides with different heat treatments were *** results show that there are significant changes of microstructure and properties in the samples with CT and TCT,especially due to the precipitation of metastable nanoparticles W_(x)Co_(y)C_(z) in the binder during the heat treatments of CT and *** the simultaneous combination of microstructure and nanoparticle-reinforced binder,a dramatically improved combination of hardness and wear resistance of the samples after TCT has been achieved.

关键词： Cryogenic treatment Tempering Coarsegrained cemented carbide Carbon content Nanoparticlereinforced binder

数字贸易视域下高职英语专业人才培养模式探究

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湖北开放职业学院学报 2024年第5期37卷 153-155页

作者：伍忠丽义乌工商职业技术学院浙江义乌322000

数字化和大数据跨境流动催生了数字贸易在全球范围内的蓬勃发展,成为全球贸易发展和经济增长的主引擎和新动能。在此背景下,高职英语专业应主动作为,将培养复合型数字贸易人才作为人才培养的又一重要任务。本文以高职英语专业为研究对象... 详细信息

数字化和大数据跨境流动催生了数字贸易在全球范围内的蓬勃发展,成为全球贸易发展和经济增长的主引擎和新动能。在此背景下,高职英语专业应主动作为,将培养复合型数字贸易人才作为人才培养的又一重要任务。本文以高职英语专业为研究对象,通过对数字贸易人才的需求和职业技能要求分析,制定人才培养目标、优化课程体系、充实教师队伍,强化自主实践全环节联动的培养方案,构建适应全球数字贸易快速发展的高职英语专业培养模式,精准服务数字贸易发展中的职业技能人才需求。

关键词：数字贸易高职英语专业人才培养

Phenotypic Classification of Well-Differentiated Gastric Adenocarcinoma

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Chinese Journal of Cancer Research 2009年第4期21卷 278-289页

作者： Ying wu zhong-wu li Ji-you li Key Laboratory of Carcinogenesis and Translational Research （Ministry of Education） Department ofPathology Peking University School of Oncology Beijing Cancer Hospital ＆ Institute Beijing 100142China

Objective： To investigate the genotypes of well-differentiated non-cardiac gastric adenocarcinoma and their clinicopathological significance. Methods： Sixty-four cases of well-differentiated non-cardiac gastric adenocarcinoma were included in this study. The expressions of intestinal phenotypic markers including CDX2, MUC2, li-cadherin, CD10, Hepatocyte（Hep） and Villin, and gastric phenotypic markers including MUC5AC and pS2 were detected immunohistochemically. Based on the expressions of phenotypic markers, 64 cases can be divided into four phenotypes. Cases only expressing intestinal phenotypic markers were classified as intestinal phenotype; cases only expressing gastric phenotypic markers as gastric phenotype; cases expressing both intestinal and gastric phenotypic markers as gastrointestinal phenotype; and cases expressing neither intestinal nor gastric phenotypic marker as null phenotype. The association of phenotype and clinic-pathological parameters was analyzed. We also detected the expressions of markers related to the development and progression of cancer, including Rb, P53, c-Met, MIF, TGF-β-RII, β-catenin, CD44v6 and E-cadherin. Results： Of 64 cases, 33（51.6%） were intestinal type, 3（4.7%） were gastric type, 25（39.1%） were gastrointestinal type and 3（4.7%） were null type. Fifty-eight cases were either intestinal or gastrointestinal type, which accounted for 90.6% of all the cases. In addition, there was an association between phenotype and biological behaviors （invasion or metastasis）. The biological behaviors of intestinal and gastrointestinal type were better than gastric type. Compared with intestinal, gastric and gastrointestinal types, the biological behaviors of null type were the most aggressive. The biological behaviors of gastric carcinoma tended to be better as the number of expression of intestinal markers increased. Expression of markers related to the development and progression of cancer was not significantly correlated with phenotypes a

关键词： Gastric carcinoma Phenotype Immunohistochemistry Biological behavior

Long-term Follow-up Study on Gastric Intestinal Metaplasia Subtype and Its Relation to Expression of P53,Bcl-2 and PCNA

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Chinese Journal of Cancer Research 2009年第4期21卷 272-277页

作者： Yu Sun zhong-wu li Guo-Shuang Feng Ji-You li Key Laboratory of Carcinogenesis and Translational Research （Ministry of Education） Department of Pathology Peking University School of Oncology Beijing Cancer Hospital ＆ Institute Beijing 100142 China Chaoyang District Center for Disease Control and Prevention Beijing China

Objective： To investigate the correlation of typies of gastric intestinal metaplasia（IM）, expression of p53, bcl-2 and the proliferating cell nuclear antigen（PCNA）, with the lesion＇s evolution. Methods： A total of 80 patients with IM（53 male and 27 female, 35-64 years old） from an area with high-risk of gastric cancer（GC） in China were enrolled into this prospective study, including 28 cases of type Ⅰ （complete）, 25 cases of type Ⅱ （incomplete） , and 27 cases of type Ⅲ （incomplete）. Of the 80 cases, 62 cases including 19 cases of type Ⅰ, 22 type Ⅱ and 21 type Ⅲ, were followed up for 5-14 years（49 cases for 14 years, 6 for 10 years, and 7 for 5 years）. All of the 80 cases were studied immunohistochemically for the expression of p53, bcl-2 and PCNA. Results： The rate of p53-expressing cases was higher in type Ⅲ（25.9%） than in type Ⅰ（10.7%） and type Ⅱ （12.0%）, but without statistical significance（P=0.3070）. The positive rate of bcl-2 was obviously lower in type Ⅰ （21.4%） and type Ⅱ （24.0%） than in type Ⅲ（37.0%）, but not statistically significant（P=0.4223）. We observed difference in PCNA labelling index （li） between type Ⅱ and type Ⅲ（P=0.0037）, and the difference was particularly significant in type Ⅰ as compared with type Ⅲ（P〈0.0001）. There was no statistical significance between type I and type II （P=0.0616）. Evolution into GC was detected in 0%, 4.5%, and 14.3% of type Ⅰ, type Ⅱ, and type Ⅲ IM cases, respectively. Progression to dysplasia was detected in 31.6%, 18.2%, and 14.3% of type Ⅰ, type Ⅱ, and type Ⅲ IM cases, respectively. Persistence of IM was documented in 31.6%, 45.5%, and 42.9% of type Ⅰ, type Ⅱ, and type Ⅲ IM cases, respectively. Regression of IM was documented in 36.8%, 31.8%, and 28.6% of type Ⅰ, type Ⅱ, and type ⅢIM cases, respectively. In progressive, persistent and regressive groups, the positive rates of p53 were 17.6%, 16.0% and 15.0%, bcl-2 were 29.4%, 36.0% and 25.0%, and PCNA lis were 24.953±14.477, 23.752±12.934 and 25.105±10.055, respect

关键词： Intestinal metaplasia Subtype Follow-up Immunohistochemistry Gastric cancer

A novel synthesis of 5-aryl-3-cyano-2-pyridones by using vinamidinium salts

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Chinese Chemical Letters 2009年第7期20卷 771-774页

作者： Xue Hui Zhang wu zhong Xing Zhou li Song li Beijing Institute of Pharmacology and Toxicology Beijing 100850 China

A variety of vinamidinium salts were condensated with cyanoacetamide in refluxing methanol that contained sodium methoxide to produce 5-aryl-3-cyano-2-pyridones in good yield. Simple experimental conditions were used to prepare ten different 5-aryl-3- cyano-2-pyridones, four of which are new compounds.C 2009 Song li. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.

关键词： 5-Aryl-3-cyano-2-pyridones Vinamidinium salts Cyclization

Phenotypic classification of gastric signet ring cell carcinoma and its relationship with clinicopathologic parameters and prognosis

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World Journal of Gastroenterology 2007年第23期13卷 3189-3198页

作者： Meng-Meng Tian Ai-lian Zhao zhong-wu li Ji-You li Department of Pathology Peking University School of Oncology and Beijing Cancer Hospital No.52. Fucheng Road Haidian District Beijing 100036 China

AIM: To distinguish subtypes of gastric signet ring cell (SRC) carcinoma by investigating the expression of gastric and intestinal phenotypic markers, and to study the significance of phenotypic classification in predicting tumor progression and outcome. METHODS: Immunohistochemistry was performed in 66 cases of SRC carcinoma with MUC2, VILliN, CDX2, li-cadherin antibodies as intestinal phenotype markers and MUC5AC, HGM, MUC6 antibodies as gastric phenotype markers, and the relationship was analyzed between the phenotypic expression pattern and clinicopathologic parameters, as well as the 3-year survival rate. RESULTS: Expression of intestinal phenotypic markers was positively associated with tumor size, wall invasion, vascular invasion, lymph node metastasis and tumor-node-metastasis (TNM) stage. Cases expressing one or more intestinal markers had a significant lower survival rate than cases expressing none of the intestinal markers. CONCLUSION: The SRC carcinomas expressing intestinal phenotype markers exhibited a high pro-liferative potential, bad biological behaviors and poor prognosis. Examination of phenotype expression may be useful in distinguishing histological type and in predicting the prognosis of gastric SRC carcinoma.

关键词： Gastric cancer Signet ring cell Phenotype Immunohistochemistry

Thermal Expansion Coefficients of Thin Crystal Films

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Communications in Theoretical Physics 2005年第5X期44卷 921-924页

作者： HUANG Jian-Ping wu Xue-zhong li Sheng-Yi Mechatronics Engineering Institute National University of Defense Science and Technology Changsha 410073 China

The formulas for atomic displacements and Hamiltonian of a thin crystal film in phonon occupation number representation are obtained with the aid of Green's function theory. On the basis of these results, the formulas for thermal expansion coefficients of the thin crystal film are derived with the perturbation theory, and the numerical calculations are carried out. The results show that the thinner films have larger thermal expansion coefficients.

关键词： thermal expansion coefficients thin crystal film Green's function perturbation theory

Inhibitory effects of N-(4-hydrophenyl) retinamide on liver cancer and malignant melanoma cells

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World Journal of Gastroenterology 2005年第37期11卷 5763-5769页

作者： Xing-zhong wu li Zhang Bi-Zhi Shi Ping Hu Department of Biochemistry and Molecular Biology Shanghai Medical College Fudan University Shanghai 200032 China

AIM: To investigate the effect of N-(4-hydrophenyl) retinamide (4-HPR), the derivative of retinoic acid, on inhibition of migration, invasion, cell growth, and induction of apoptosis in hepatocellular carcinoma cells (HCCs) and malignant melanoma ***: 4-HPR was chemically synthesized. Cellular migration and invasion were assayed by Borden chamber experiment. Cell growth was assayed by MTT *** effect was measured using Hoechst 32258 staining and flow cytometry. Gene transfection was performed with ***: We observed that the migration of HCC and melanoma cells was significantly suppressed by 4-HPR and the migration cells were reduced to 58±5.03 (control 201±27.2, P＜0.05, n = 4) in SMMC 7721-k3 HCC, and to 254±25.04 (control 302±30.1, P＜0.05, n = 4) in melanoma cells after 6-h incubation with 4-HPR. The invasion through reconstituted basement membrane was also significantly reduced by 4-HPR treatment to 11.2±3.3 in SMMC 7721-k3 HCC (control 27±13.1), and to 24.3±3.2 in melanoma cells (control 67.5±10.1, P＜0.05, n = 3). Cell growth, especially in melanoma cells, was also significantly ***, 3 μmol/L of 4-HPR induced apoptosis in B16 melanoma cells (37.11±0.94%) more significantly than all-trans retinoic acid (P＜0.05), but it failed to induce apoptosis in SMMC 7721-k3 HCC. The mechanism for 4-HPR-induced apoptosis was not clear, but we observed that 4-HPR could regulate p27kip1, and overexpression of cerebroside sulfotransferase (CST) diminished the apoptosis induced by 4-HPR in melanoma ***: 4-HPR is a potent inhibitor of HCC migration and inducer of melanoma cell apoptosis. CST and p27kip1 expression might be associated with 4-HPR-induced apoptosis.

关键词： N-(4-hydrophenyl) retinamide Apoptosis CST p27^kip1

Abdominoperineal excision following preoperative radiotherapy for rectal cancer: Unfavorable prognosis even with negative circumferential resection margin

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World Journal of Gastroenterology 2014年第27期20卷 9138-9145页

作者： lin Wang Guo-li Gu zhong-wu li Yi-Fan Peng Jin Gu Department of Colorectal Surgery Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education)Peking University Cancer Hospital and Institute Department of General Surgery Air Force General Hospital Department of Pathology Department of GastroenterologyKey Laboratory of Carcinogenesis and Translational Research (Ministry of Education)Peking University Cancer Hospital and Institute

AIM: To evaluate whether an abdominoperineal excision (APE) is associated with increased local recurrence (LR) and shortened disease-free survival (DFS) in mid-low rectal cancer with a negative circumferential resecti... 详细信息

关键词： Abdominoperineal excision Preoperative radiotherapy Circumferential resection margin Survival

Pericryptal Fibroblast Sheath in Intestinal Metaplasia,Dysplasia and Carcinoma of the Stomach

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Chinese Journal of Cancer Research 2009年第4期21卷 290-294页

作者： Lu-ying liu Yu Sun zhong-wu li Guoshuang Feng Wei-cheng You Ji-you li Key Laboratory of Carcinogenesis and Translational Research （Ministry of Education） Department of Pathology Department of Cancer Epidemiology Peking University School of Oncology Beijing Cancer Hospital ＆ Institute Beijing 100142 China Department of Pathology Binzhou Medical College Binzhou China

Objective： To investigate the existence of pericryptal fibroblasts sheath （PCFS） in normal gastric mucosa, intestinal metaplasia （IM）, indefinite for dysplasia （I-Dys）, low grade dysplasia （L-Dys）, high grade dysplasia （H-Dys） and gastric cancer （GC）, and its association with gastric carcinogenesis. Methods： In this study, we examined the existence of PCFS in normal gastric mucosa （N=10）, IM （N=26）, I-Dys （N=16）, L-Dys （N=13）, H-Dys （N=21） and GC （N=145） using immunohistochemical staining for two smooth muscle markers, alpha smooth muscle actin（α-SMA） and high molecular weight caldesmon （h-CD）. The significance of PCFS was discussed, especially in association with gastric carcinogenesis. Results： The PCFS was recognized in 65.4%（17/26） of IM, 62.5%（10/16） of I-Dys and 23.1% （3/13） of L-Dys respectively. No PCFS was detected in H-Dys and GC. The PCFS was gradually reduced in IM, Dys and GC in sequence （P〈0.0001）. Conclusion： The PCFS is associated with the differentiation of epithelium and involved in gastric carcinogenesis via epithelial-mesenchymal interaction.

关键词： Pericryptal fibroblasts sheath (PCFS) Gastric cancer (GC) Carcinogenesis Intestinal metaplasia (IM) Dysplasia